CVE-2026-5222
Cargo can be coerced to share credentials between registries
No exploitation reported by the sources we read.
- Published2026-05-25
- Fixed in0.97.0
- WeaknessCWE-647
Am I affected?
Debian, Ubuntu or Red Hat sometimes backport a fix without changing the upstream version number: such a version reads « to verify », never « affected ».With a domain, we read the version its public headers and pages expose. A distribution build can carry the fix under an older number.
Description
Cargo between 1.68 and 1.96 incorrectly normalized the URLs of third-party registries using the sparse index protocol. If a hosting provider allowed multiple registries to be hosted with arbitrary names within the same domain, an attacker able to publish crates in a registry could obtain the credentials of others users of the same registry. The severity of the vulnerability is **low**, due to the extremely niche requirements needed to achieve the attack.
Timeline
dates in UTC- 2026-05-2510:16CVE publishedNVD
Observed activity
isMalicious corpus · updated 2026-10-23 21:37 UTCBlock these indicators
- Firewall list (EDL, text): https://api.ismalicious.com/edl/cve/CVE-2026-5222?format=txt
- CSV export: https://api.ismalicious.com/edl/cve/CVE-2026-5222?format=csv
- TAXII collection of exploited CVEs
- The EDL and CSV take an API key on the Pro plan.
Versions per branch
OSV · NVD| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 0.97 | < 0.97.0 | 0.97.0 | OSV |
| Branch | Affected | Fixed in | Source |
|---|---|---|---|
| 1.x | ≥ 1.68.0, < 1.96.0 | 1.96.0 | NVD |
as publishedRanges as NVD and OSV publish them; a distribution’s build can be fixed under an older number.
Distribution builds and vendor advisories
Packages from OSV.dev and products from the vendors' CSAF advisories.
version not verifiedVersions not verified: read as OSV.dev and the vendors publish them, not checked against each vendor's release list.
Vendor advisories
- CVE-2026-5222 Red Hat Product Security
rust-cargo: rust-cargo: Information disclosure due to URL normalization flaw
Fix
- Update cargo to 0.97.0
Advisories and patches
- blog.rust-lang.orgVendor Advisory
- github.comPatch
Detection
- Nuclei template
- none so far ProjectDiscovery
- Exploit-DB
- no entry Exploit-DB
- Proof-of-concept repositories
- none listed PoC-in-GitHub
Sources
- CISA-ADPSSVC decisionnone2026-05-26
- OpenCVESSVC decisionnone—
- CNACVSS 4.02.3read 2026-10-23
- NVDCVSS 3.16.5read 2026-10-23
- CNAweakness (CWE)CWE-647read 2026-10-23
- FIRST EPSSEPSS score0.5 %2026-10-23
- OSVaffected packages—
- Microsoft MSRCadvisory—
Technical details
- CVSS v3 Vector
- CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N
- CVSS 4.0 vector
- CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:P/VC:L/VI:N/VA:N/SC:L/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X
- Published
- 2026-05-25
- Last Modified
- 2026-07-23
- NVD status
- Analyzed
- MSRC Title
- Cargo can be coerced to share credentials between registries
Frequently asked questions
What is CVE-2026-5222?
Is CVE-2026-5222 actively exploited?
What is the CVSS score for CVE-2026-5222?
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Related vulnerabilities
Same product first, then the same vendor advisory and the same publication week.